2010 Construction and Material Specifications - Ohio Department of ...

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401.05
Test blended RAP stockpiles to assure uniform gradation and asphalt binder
content. Ensure uniform stockpile properties match the JMF submitted RAP
properties unless the uniform stockpile will be processed into the asphalt plant
using plant cold feed in line processing.
If the uniform stockpile will be processed into the asphalt plant using plant cold
feed in line processing determine the processed RAP properties for use in the mix
design. Record in the JMF submittal both the uniform stockpile and in line
processed RAP properties.
If desired, when applying Method 1 Standard RAP requirements, use concurrent
Department project RAP in a stream process in place of stockpiling and testing for
uniformity but do so in the following manner. Concurrent project RAP must be
taken from one existing mix type on the concurrent project or two existing mix
types if both mix types are taken at the same time in one pass of the milling
machine. Submit a new JMF for each existing mix type on the project (or each
milling pass of two types) desired for use as concurrent project RAP. Include in
the QCP methods of validating RAP properties when using concurrent project
RAP. If these requirements are not met blend and test for uniformity and apply the
stockpile requirements of this specification.
Maintain in the plant lab and control room an up to date and dated site map of
all tested and untested RAP stockpiles. Give each stockpile a unique identification.
Provide in the plant lab RAP properties for each uniform, blended stockpile cross
referenced with its identification. In addition, provide the date the stockpile
processing was completed and the stockpile estimated size in tons. The DET may
require RAP pile staking for failure to maintain the above. Do not add to a
stockpile once it is tested for uniformity. Provide signage at all uniform stockpiles
to inform haulers that uniform piles are not to be added to.
Stockpiles and processing methods are subject to inspection and approval by the
DET at any time. Rejection of stockpiles can occur for the presence of foreign or
deleterious materials, lack of uniformity, incomplete mixing in the asphalt mixture,
adding to piles, or moving RAP in a way not traceable thru the QCP records and
methods. The Laboratory will resolve disputes over acceptability of RAP.
401.05 Mixing Plants. The Department will approve mixing plants before
preparation of the mixtures. General requirements for asphalt concrete mixing
plants are specified in Item 402.
Set the asphalt binder controls for the computerized plant at the virgin asphalt
binder content of the JMF at all times unless change is authorized by the
Laboratory.
Asphalt mixtures may be produced using the warm mix asphalt method
according to 402.09 except as restricted by specification.
401.06 Weather Limitations. Place asphalt concrete only if the surface is dry
and if weather conditions are such that proper handling, finishing, and compaction
can be accomplished. Never place asphalt concrete if the surface temperature is
below the minimum established in Table 401.06-1.